Where do you travel that you need wifi?
I’ve been getting SIM cards for over a decade, now even eSIMs are cheap enough for casual use.
Changing countries a lot reduces this option a bit.
I’m sure I could find a good all Europe card, but I need my number for work calls.
Convenient to connect all devices to one WiFi. E.g. baby camera is on same WiFi as laptop etc.
I can’t put a SIM in my ereader or Switch or iPad.